如何驯服JOptionPane对话框中的X?

已更改为显示如何根据问题的操作说明忽略对话框上的“取消”按钮:

JOptionPane pane = new JOptionPane("Are you hungry?", JOptionPane.QUESTION_MESSAGE, JOptionPane.YES_NO_OPTION);

JDialog dialog = pane.createDialog("Title");
dialog.addWindowListener(new WindowAdapter() {
    public void windowClosing(WindowEvent evt) {
    }
});
dialog.setContentPane(pane);
dialog.setDefaultCloseOperation(JDialog.DO_NOTHING_ON_CLOSE);
dialog.pack();

dialog.setVisible(true);
int c = ((Integer)pane.getValue()).intValue();

if(c == JOptionPane.YES_OPTION) {
  JOptionPane.showMessageDialog(null, "eat!", "Order",JOptionPane.PLAIN_MESSAGE);
}
else if (c == JOptionPane.NO_OPTION) {
  JOptionPane.showMessageDialog(null, "ok cool", "Order",JOptionPane.PLAIN_MESSAGE);
}

你必须这样做:

public static int showConfirmDialog(Component parentComponent,
    Object message, String title, int optionType)
{
    JOptionPane pane = new JOptionPane(message, JOptionPane.QUESTION_MESSAGE,
        optionType);
    final JDialog dialog = pane.createDialog(parentComponent, title);
    dialog.setVisible(false) ;
    dialog.setLocationRelativeTo(parentComponent);
    dialog.setDefaultCloseOperation(javax.swing.WindowConstants.DO_NOTHING_ON_CLOSE);
    dialog.setModal(true);
    dialog.setVisible(true) ;
    dialog.dispose();
    Object o = pane.getValue();
    if (o instanceof Integer) {
        return (Integer)o;
    }
    return JOptionPane.CLOSED_OPTION;
}

dialog.setDefaultCloseOperation(javax.swing.WindowConstants.DO_NOTHING_ON_CLOSE);